:root{
    --bg:#05070e; --ink:#eaf0ff; --muted:#8ea3cf; --gold:#e9c46a; --accent:#67e8f9;
    --line:rgba(130,160,210,.14); --panel:rgba(10,14,26,.72);
    --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
    --sans:"Space Grotesk",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  }
  *{box-sizing:border-box}
  html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);font-family:var(--sans);
    overflow:hidden;-webkit-font-smoothing:antialiased;letter-spacing:.01em}
  #graph{position:fixed;inset:0;touch-action:none}
  /* techy depth: faint grid + accent glows + vignette, above the canvas but below the labels */
  body::after{content:"";position:fixed;inset:0;z-index:1;pointer-events:none;
    background:
      radial-gradient(120% 80% at 50% -12%, rgba(103,232,249,.06), transparent 55%),
      radial-gradient(120% 90% at 50% 116%, rgba(233,196,106,.05), transparent 55%),
      linear-gradient(rgba(125,150,205,.028) 1px, transparent 1px) 0 0/46px 46px,
      linear-gradient(90deg, rgba(125,150,205,.028) 1px, transparent 1px) 0 0/46px 46px,
      radial-gradient(150% 130% at 50% 50%, transparent 58%, rgba(0,0,0,.5))}

  header{position:fixed;top:0;left:0;right:0;z-index:10;padding:13px 20px;display:flex;gap:18px;align-items:center;
    background:linear-gradient(180deg,rgba(5,7,14,.92),rgba(5,7,14,0));pointer-events:none}
  .brand{pointer-events:auto;min-width:0}
  h1{margin:0;font-size:15px;letter-spacing:.32em;font-weight:600;text-transform:uppercase;pointer-events:auto;
    display:flex;align-items:center;gap:10px}
  h1 .d{color:var(--accent)}
  header .sub{font-family:var(--mono);font-size:10.5px;color:var(--muted);max-width:440px;line-height:1.55;
    pointer-events:auto;letter-spacing:0;margin-top:4px;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

  #search{margin-left:auto;pointer-events:auto}
  #search input{font-family:var(--mono);background:rgba(10,14,26,.66);border:1px solid var(--line);color:var(--ink);
    border-radius:8px;padding:9px 14px;font-size:12px;width:250px;outline:none;transition:.18s;backdrop-filter:blur(8px)}
  #search input::placeholder{color:#5f6f95}
  #search input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(103,232,249,.12)}

  #controls{pointer-events:auto;display:flex;gap:7px}
  #controls button{font-family:var(--mono);background:rgba(10,14,26,.6);border:1px solid var(--line);color:var(--muted);
    border-radius:8px;padding:8px 13px;font-size:11px;letter-spacing:.03em;cursor:pointer;transition:.16s;backdrop-filter:blur(8px)}
  #controls button:hover{color:var(--ink);border-color:var(--accent);box-shadow:0 0 0 3px rgba(103,232,249,.1)}
  #controls button.active{color:#04121a;background:linear-gradient(180deg,#9ff2ff,var(--accent));border-color:var(--accent);
    font-weight:700;box-shadow:0 0 16px rgba(103,232,249,.35)}

  /* detail panel — glass */
  #panel{position:fixed;top:66px;right:16px;z-index:11;width:344px;max-height:calc(100vh - 150px);overflow:auto;
    background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:0;transform:translateX(390px);
    transition:transform .34s cubic-bezier(.2,.7,.2,1);box-shadow:0 24px 70px rgba(0,0,0,.6),0 0 0 1px rgba(103,232,249,.05);
    backdrop-filter:blur(16px) saturate(140%)}
  #panel.open{transform:none}
  #panel .ph{height:170px;background:#0b1020 center/cover no-repeat;border-radius:16px 16px 0 0;border-bottom:1px solid var(--line)}
  #panel .bd{padding:16px 18px 20px}
  #panel .tag{font-family:var(--mono);display:inline-block;font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;
    color:var(--accent);background:rgba(103,232,249,.08);border:1px solid rgba(103,232,249,.3);border-radius:6px;
    padding:3px 9px;font-weight:600;margin-bottom:11px}
  #panel h2{margin:0 0 3px;font-size:21px;line-height:1.15;font-weight:600;letter-spacing:.01em}
  #panel .years{font-family:var(--mono);color:var(--gold);font-size:12px;margin-bottom:11px;letter-spacing:.02em}
  #panel .row{display:flex;gap:10px;font-size:12.5px;line-height:1.5;padding:6px 0;border-top:1px solid var(--line)}
  #panel .row .lab{font-family:var(--mono);color:#7f92bd;flex:0 0 84px;text-transform:uppercase;font-size:9.5px;
    letter-spacing:.08em;padding-top:2px}
  #panel .row .val{flex:1;color:var(--ink)}
  #panel .note{margin-top:11px;font-size:12.5px;line-height:1.6;color:#c6d2f2;font-style:italic}
  #panel .close{position:absolute;top:10px;right:12px;cursor:pointer;color:#fff;background:rgba(0,0,0,.35);
    border-radius:8px;width:28px;height:28px;display:flex;align-items:center;justify-content:center;font-size:16px;
    border:1px solid var(--line);transition:.15s}
  #panel .close:hover{border-color:var(--accent);color:var(--accent)}
  #panel::-webkit-scrollbar{width:7px}
  #panel::-webkit-scrollbar-thumb{background:rgba(130,160,210,.2);border-radius:9px}

  /* legend / hud / crumbs — mono glass */
  #legend{position:fixed;left:16px;bottom:14px;z-index:10;display:flex;flex-wrap:wrap;gap:5px 13px;max-width:56vw;
    font-family:var(--mono);font-size:10px;letter-spacing:.02em;color:var(--muted);background:var(--panel);
    border:1px solid var(--line);border-radius:12px;padding:10px 13px;backdrop-filter:blur(10px)}
  #legend b{width:100%;color:var(--ink);letter-spacing:.2em;font-size:9px;margin-bottom:2px;text-transform:uppercase}
  .lg{display:inline-flex;align-items:center;gap:6px}
  .sw{width:9px;height:9px;border-radius:2px}
  #hud{position:fixed;right:16px;bottom:14px;z-index:10;font-family:var(--mono);font-size:10px;color:var(--muted);
    text-align:right;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:10px 13px;
    line-height:1.7;letter-spacing:.02em;backdrop-filter:blur(10px)}

  #crumbs{position:fixed;left:16px;top:76px;z-index:10;display:flex;gap:6px;align-items:center;
    flex-wrap:nowrap;overflow-x:auto;max-width:calc(100vw - 32px);font-family:var(--mono);font-size:10.5px;
    padding-bottom:5px;scrollbar-width:thin}
  #crumbs::-webkit-scrollbar{height:5px}
  #crumbs::-webkit-scrollbar-thumb{background:rgba(130,160,210,.25);border-radius:9px}
  .crumb{flex:0 0 auto;white-space:nowrap;pointer-events:auto;cursor:pointer;padding:4px 10px;border:1px solid var(--line);
    border-radius:7px;background:rgba(10,14,26,.6);color:var(--muted);letter-spacing:.02em;transition:.15s;backdrop-filter:blur(8px)}
  .crumb:hover{color:var(--ink);border-color:var(--accent)}
  .crumb.active{background:linear-gradient(180deg,#9ff2ff,var(--accent));color:#04121a;border-color:var(--accent);font-weight:700}
  .crumb.child{color:var(--ink);background:rgba(10,14,26,.5);border-style:dashed;opacity:.85}
  .crumb.child:hover{opacity:1;border-color:var(--accent)}
  .crumb-sep{flex:0 0 auto;color:var(--accent);opacity:.75;font-size:10px;padding:0 2px}

  #loading{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;z-index:30;background:var(--bg);
    color:var(--muted);font-family:var(--mono);font-size:12px;letter-spacing:.25em;text-transform:uppercase}
  #loading::after{content:"";width:14px;height:14px;margin-left:12px;border:2px solid var(--line);
    border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}
  @keyframes spin{to{transform:rotate(360deg)}}
  #loading.done{display:none}

  a{color:var(--accent);word-break:break-word;text-decoration:none;border-bottom:1px solid rgba(103,232,249,.3)}
  a:hover{border-bottom-color:var(--accent)}
  #panel a{color:var(--accent)}
  input[type=search]{-webkit-appearance:none;appearance:none}
  /* native hover tooltip from the graph library */
  .scene-tooltip{font-family:var(--mono)!important;font-size:11px!important;color:var(--ink)!important;
    background:var(--panel)!important;border:1px solid var(--line)!important;border-radius:7px!important;
    padding:4px 9px!important;letter-spacing:.02em!important}

  /* =====================  MOBILE / TOUCH  ===================== */
  @media (max-width:640px){
    /* stack the header vertically so title / description / buttons / search never overlap
       (position:relative keeps them in normal flow AND above the fixed graph via z-index) */
    header{position:relative;top:auto;flex-direction:column;align-items:stretch;gap:7px;padding:9px 11px;
      background:linear-gradient(180deg,#05070e,#05070eea)}
    .brand{min-width:0}
    h1{font-size:13px;letter-spacing:.16em;white-space:normal}
    header .sub{font-size:10px;max-width:none;line-height:1.4}
    #controls{display:flex;gap:6px}
    #controls button{flex:1 1 0;padding:10px 4px;font-size:10.5px;min-height:40px;white-space:nowrap}
    #search{margin-left:0}
    #search input{width:100%;min-width:0;padding:10px 12px;font-size:13px}
    #crumbs{position:relative;top:auto;left:auto;right:auto;margin:0 11px 5px;flex-wrap:nowrap;
      overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:3px;scrollbar-width:none}
    #crumbs::-webkit-scrollbar{display:none}
    .crumb{flex:0 0 auto;padding:6px 10px}
    /* detail panel becomes a bottom sheet */
    #panel{top:auto;left:0;right:0;bottom:0;width:100%;max-width:100%;
      max-height:70vh;border-radius:18px 18px 0 0;transform:translateY(110%)}
    #panel.open{transform:none}
    #panel .ph{border-radius:18px 18px 0 0}
    #panel .close{width:34px;height:34px;font-size:20px}
    #legend{font-size:9px;gap:3px 9px;max-width:calc(100% - 18px);left:9px;bottom:9px;padding:8px 10px}
    #legend b{font-size:8.5px}
    #hud{display:none}
  }
  @media (max-width:640px) and (min-height:0){
    #panel::before{content:"";position:absolute;top:8px;left:50%;transform:translateX(-50%);
      width:40px;height:4px;border-radius:99px;background:var(--muted);opacity:.5;z-index:2}
    #panel .bd{padding-top:22px}
  }